Boiler.



. UNITED STATES Patented May 31, 1904.

PATENT OFFICE.

AUGUSTUS A. BALL, JR., OF LYNN, MASSACHUSETTS, ASSIGNOR, BY

MESNE ASSIGNMENTS, TO GENERAL ELECTRIC COMPANY, A CORPO- RATION OF NEW YORK.

BOILER.

SPECIFICATION forming part of Letters Patent N0. 761,130, dated May 31, 1904.

Application filed August 10, 1903. Serial No. 168,924. (No model.)

To all whom it may concern:

Be it known that I, AUeUsTUs A. BALL, Jr., a citizen of the United States, residing at Lynn county of Essex, State of Massachusetts, have invented certain new and useful Improvements in Boilers, of which the'following is a specification. 1

This invention relates to a water-tube boiler of the flasher type in which the coils are supported in a manner that permits oftheir easy removal from the boiler-casing. For obvious reasons it is desirable to have the coils supported in the boiler-casing by a means which renders their removal an easy matter. This is an important feature in an automobile steam plant. where accessibility to the boiler side of the casing to facilitate the removal of the coils.

The several novel features of construction and combination of parts will be hereinafter more fully described, and set forth in the claims.

In the accompanying drawings, which illustrate one embodiment of my invention, Figure 1 is a central vertical section of a boiler with portions thereof in elevation, and Fig. 2 is a top plan sectional View on line 2 2, Fig. 1.

In automobile construction it is common practice to arrange the boiler on suitable supports in the vehicle-body, and the boiler is usually closed in, except at its bottom portion, which is left open to permit access to the burner and to afford draft to the boiler. This open space at the bottom of the boiler permits of easy detachment of the burner, and,furthermore, the removal of the steam-generating coils when necessity demands.

Referring to the drawings, 1 is a nest of steam-generating coils of any desired character, and 2 the shell or casing of the boiler, the latter being jacketed with a suitable heat-nonconducting material 3, as asbestos. The casing is preferably cylindrical. and open at the .bottom. A double-draft flue 4: is arranged with branches for the natural and forceddrafts, and at the mouth of the fine a combined baffling and injecting device 5 is provided for creating the forced downdraft and preventing back draft from external currents of air. In the bottom oropen end of the casing is detachably supported a hydrocarbon-burner 6. Any suitable means for supporting the burner may be employed; but, as shown, it is "bolted to supporting-lugs 7 of the casing.

The boiler proper consists,.preferably, of a coil of pipe formed with numerous turns,which are secured rigidly in fixed relation by passing through plates 8. The pipe thus forms asingle rigid nest, which can be readily'placed in position in the casing or removed therefrom. iA cross-bar 9 is arranged diametrically over the coil and is riveted to two or more of the plates 8. Rigidly attached to the ends of the cross-bar are supporting members or standards 10. These standards are removably' secured to supports exterior of the easing of the boiler. The supports, of which two or more may be used, serve as the sole means for sustaining the weight of the coil, and for this reason they must be secured in fixed relation to the casing. The casing itself is secured to permanent supports 11, which are preferably suitable parts of the vehicle frame or body 19. The supports 11 also sustain the weight of the coil through the me dium of the links or bolts 12. These latter are secured to the supports 11 at their upper ends and at their lower ends-to the standards 10, which'extend laterally from the open end of the casing. By this arrangement the coil is supported wholly independent of the casing of the boiler. This facilitates the removal of the coilwithout interfering with the casing or vehicle-body and relieves the shell of the weight of the coil.

Within the casing is a reheating-coil 13, which enters the boiler by passing througha recess 1 1 in the lower edge of the shell or casing adjacent the burner. V This reheating-coil describes a few turns near the burner and then passes as a riser at the axis of the main coil to the top thereof, where it extends radially toward the exhaust or flue 4c. The function of this coil'is to receive the exhaust-steam, either directly or indirectly, from the engine, and by passing through the coil the steam becomes reheated and is caused to issue into the injection device in the flue, thereby creating a forced draft and practically an invisible exhaust. The discharge end of the reheating-coil projects to a point in close proximity to the flue and injecting device, but

sufficiently short of the same as to pass clear of the shell or casing when the coil is removed. The relative arrangements of the discharge end of the pipe 13 and the injecting device 5 are immaterial so long as they can be separated without difliculty. The important thing is to be able to quickly separatethe parts when it is desired to remove the boiler-coil fromthe casing. The reheating-coil is supported on the main coil by any suitable means, .as links or clips 15, and is thus practically a part of the main coil in respect to its being removable therewith.

The cylindrical shell or casing of the boiler isprovided with grooves16, Fig. 2, in its inner surface, and these receive the standards 10 and form vguideways therefor to assist in removing or inserting the coils. In theportion of the boiler forming the combustion-chamber a cylindrical lining 17 is provided to protect the shell and the-standards from the heat of the fire. The lining is supported with the main coil between the same and the standards and is intended to be removable therewith.

In practice the coils are suitably connected in the piping system leading to and from the engine and the source of water-supply, and couplings 18, located exterior of the casing, facilitate connection and disconnection of the coils of the boiler relatively to the piping system. In order to remove the coils, obviously the burner must be first removed. The pipe couplings 18 are then disconnectedand next, by removing the lower end nuts on the suspension-bolts, the standards are free to disengage from the bolts, As the suspension-bolts are the sole supports for the coils, the coils are. free to drop out of the casing from the bottom as soon as the nuts are removed.

From the foregoing it will be understood that the coils, the cross-bar, the standards,and the lining are supported and removedas one structure. This is especially desirable, as it greatly facilitates the repair or inspection of the boiler, and as these members drop through the bottom of the casing simply by detaching the standards from the suspension-bolts it oh} viates the usual necessity of disorganizing much of the vehicle and its equipment.

In accordance with the provisions of, the patent statutes I have described the principle of operation of my invention, together with the apparatus, which I now consider to be the best embodiment thereof; but I desire to have it understood that the apparatus is only illustrative and that the invention can be carried out by other means.

What I claim as new, and desire to secure by Letters Patent of the United States, is-

1. The combination of a coil of pipe, a casing therefor suitably supported, and means independent and exterior of the casing for removably supporting the coil.

2. The combination of a coil of pipe, an open -bottom casing therefor supported in fixed position, and means independent of the casing and at the bottom thereof for removably supporting the coil.

3. The combination of a coil of pipe, a casing for the same open at its bottom, stationary supports for the casing, and means attached to the stationary supports for removably supporting the coil in the casing. v

4:. Th'ecombination of a coil of pipe, a cas ing therefor open at its bottom and supported independently of the coil, rigid members attached to the coil and extending through the bottom of the casing, and means in fixed position relatively to the casing for detachably supporting said members.

5. The combination of a casing open at its bottom, a coil of pipe, plates securing the turns of the coil in fixed relation, a diametrically-disposed cross-bar fixed to the top of the .coil, standards rigid at'their upper ends with the cross-bar and projecting exterior of the casing at the bottom, permanent supports for the casing, and suspension-bolts on the supports engaging the lower ends of the standards.

6. The combinationof a casing open at the bottom, a COll of pipe having its turns secured 1n fixed relation, a cross-bar carrying the coil,

standards rigid at their upper ends with the cross-bar and projecting laterally from the open end of the casing at their lower ends, grooves in the inner surface of the casing for receiving the standards, a lining for the easing connected with the coil between the latter andthe standards, permanent supports for the casing, and suspension means in fixed position relatively to the casing removably connected with the laterally-extending ends of the standar s.

7 The combination ofoa casing open at the bottom, a double-draft flue for the gases of combustion, an exhaust-injecting device in the flue for creating a forced draft, a removable steam generating coil supported independently of the casing, and an exhaust-reheating coil secured on the stearn-generating coil and removable therewith, the discharge end of the reheating-coil being disposed adjacent.

said injecting device.

8. The combination of a vehicle-body, an open-bottom boiler-casing rigidly supported in the body, a steam generating coil within the casing, and means independent of and in permanent relation to the casing for removably supporting the coil.

9. In a boiler, the combination of a casing having an open end, a coil of pipe mounted therein and detachable through the open end, and a steam-carrying connection which has its continuity broken by the removal of the coil.

10. In a boiler, the combination of a casing having an open end, a coil of pipe mounted therein and detachable through the open end, a device for discharging the exhaust which is stationary with the casing, and a connection movable with the coil that movably discharges into the said device.

11. In combination, a casing, a removable vaporizer-coil mounted therein, an exhaust- 

